科研之友
微信
新浪微博
Facebook
分享链接
摘要
Mytilus galloprovincialis is a common species in the Mediterranean. It is a sedentary filter-feeding organism that assimilates carbon and nitrogen isotopic ratios in tissues from its food sources. The delta C-13 and delta N-15 values have been used to demonstrate differences in isotopic composition between digestive gland, muscle and gills of this mussel. For delta C-13, mean values were -21.99 +/- 0.50%., -19.70 +/- 0.44%., and -19.96 +/- 0.44%., respectively; and for delta N-15, they were 5.16 +/- 0.90%o, 7.67 +/- 0.79%o and 7.77 +/- 0.85%o, respectively. The fractionation or enrichment factor for C-13 values between digestive gland and muscle, between digestive gland and gills, and between muscle and gills were -2.29 +/- 0.16%., -2.04 +/- 0.14%o and 0.27 +/- 0.07%., respectively, within the expected range of C-13 fractionation at filter feeders reported elsewhere. In contrast, low fractionation values were found for N-15 with -2.45 +/- 0.24%.,-2.51 +/- 0.16%. and -0.11 +/- 0.16%o, between digestive gland and muscle, between digestive gland and gills, and between muscle and gills, respectively. Through isotopic fractionation of M. galloprovincialis, the depleted values were found in the digestive gland, followed by gills and then by muscle tissue. Statistical analysis (PERMANOVA) was performed to check for significant differences in delta C-13 and delta N-15 isotopic signatures between tissues and localities. The current study demonstrates significant differences in the delta C-13 and delta N-15 isotopic composition between digestive gland, muscle and gills tissues in M. galloprovincialis living in the oligotrophic environment of the Balearic Islands.
- 出版日期2009-1-31
